VFS: Busy inodes after unmount of loop1 (iso9660) ------------[ cut here ]------------ kernel BUG at fs/super.c:651! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 23566 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:generic_shutdown_super+0x2e9/0x390 fs/super.c:651 Code: 28 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 9a 00 00 00 48 8b 55 00 48 8d b3 70 06 00 00 48 c7 c7 80 6b 7f 8b e8 e8 68 65 ff 90 <0f> 0b e8 40 4e ed ff e9 3c fd ff ff 4c 89 ef e8 33 4e ed ff e9 d0 RSP: 0018:ffffc900116c7d98 EFLAGS: 00010286 RAX: 0000000000000031 RBX: ffff888036d76000 RCX: ffffffff8199cad9 RDX: 0000000000000000 RSI: ffffffff819a4976 RDI: 0000000000000005 RBP: ffffffff8e5002a0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffff888036d76788 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880750878c0 FS: 000055558146c500(0000) GS:ffff888124e72000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1b49f156c0 CR3: 0000000068366000 CR4: 0000000000350ef0 Call Trace: kill_block_super+0x3b/0x90 fs/super.c:1723 deactivate_locked_super+0xc1/0x1a0 fs/super.c:474 deactivate_super fs/super.c:507 [inline] deactivate_super+0xde/0x100 fs/super.c:503 cleanup_mnt+0x225/0x450 fs/namespace.c:1318 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xdd/0x100 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x419/0x4e0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc043f901f7 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffec6b03c18 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00007fc044011d7d RCX: 00007fc043f901f7 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffec6b03cd0 RBP: 00007ffec6b03cd0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffec6b04d60 R13: 00007fc044011d7d R14: 0000000000297523 R15: 00007ffec6b04da0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:generic_shutdown_super+0x2e9/0x390 fs/super.c:651 Code: 28 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 9a 00 00 00 48 8b 55 00 48 8d b3 70 06 00 00 48 c7 c7 80 6b 7f 8b e8 e8 68 65 ff 90 <0f> 0b e8 40 4e ed ff e9 3c fd ff ff 4c 89 ef e8 33 4e ed ff e9 d0 RSP: 0018:ffffc900116c7d98 EFLAGS: 00010286 RAX: 0000000000000031 RBX: ffff888036d76000 RCX: ffffffff8199cad9 RDX: 0000000000000000 RSI: ffffffff819a4976 RDI: 0000000000000005 RBP: ffffffff8e5002a0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffff888036d76788 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880750878c0 FS: 000055558146c500(0000) GS:ffff888124e72000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1b493e7dac CR3: 0000000068366000 CR4: 0000000000350ef0